Core-oven



(No Model.) I

E. MILLETT.

GORE OVEN. No. 366,733. Patented July 19, 1887.

u. PEIERS, "Mom n nnnnnnnnnnnn c UNITED STATES PATENT OFFICE.

ELI MILLETT, ()F SPRINGFIELD, MASSACHUSETTS.

CORE-OVEN.

SPECIFICATION forming part of Letters Patent N0.366,'733, dated July 19,1887.

(No model.)

To (tZZ whom, it may concern.-

Beit-known that I, ELI ll'lILLETT, a citizen of the UnitedStates, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Gore-Ovens, of which the following is a specification.

This invention relates to core-ovens, the object being to provide an oven of improved construction in which to bake cores which are used for casting hollow metal articles, where: by cores to be baked and which have been sufficiently baked may be supplied to and withdrawn from the oven without essentially i11- terfering with the baking-heat of the latter,

thereby greatly facilitating the operation of baking such cores.

In the drawings forming part of this specification, Figure 1 is a perspective view of a core-oven constructed according to my invention. Fig. 2 is a perspective view of one of the pivoted shelves of the oven and the two doors attached thereto, the position of the usual metal plates on which cores are placed to be baked being shown in dotted lines on the shelf.

Heretofore core ovens have been constructed with permanent shelves therein of metal, or with transverse metal bars running horizontally thereacross, on which to place the metal pans or plates holding the cores to be baked, and having a door covering the entire front of the baking-chamber in the oven, which must be opened when cores are put into or taken out from the oven, thereby admitting so much cold air into the latter that itseriously retards the operation of baking the cores; but by the employment of the herein-described improved oven, wherein no door is left open when the cores are put in or taken therefrom, the above inconveniences are entirely obviated.

In the drawings, A. indicates the usualoven structure of brick, in which is provided a suitable chamber to receive shelves or bars for holding the core-pans, and having the requisite furnace below said chamber, provided with the furnace door or doors 0 and the ashpit door or doors 0, which furnace communicates in the ordinary way with said chamber, and a smoke-pipe, B, leads from the latter to any suitable chimney. Instead, however, of supplying the bakingchamber of the oven with any of the aforcsaidlixed shelves or bars, I provide a metallic shelf-frame, 2, which is bolted securely to the front side of the oven, surrounding the borders of the baking-chamber therein, which shelf-frame is provided with a series of fixed perforated knuckles, 0, and to said knuckles and the border of the frame on which they are, are hung the belowdescribed shelves and doors. The said frame 2 is provided with a series of transverse bars, 21, dividing the opening in said frame into as many spaces (five being shown in the drawings) as it is desired to provide shelves in the oven, be it more or less, the inner and the outer faces of that part of the frame 2 surrounding the shelf-spaces being adapted to have a shelf-door shut against said faces, as below set forth.

Each of the abovc-mentioncd shelves and doors consists of the two doors 4 and 5, (see Fig. 2,) constructed, preferably, of suitable metal plates, of proper length and width to close against the opposite sides of the frame 2 and to shut the shelf-openings therethrough, as aforesaid, the said doors being united by one end in any suitable manner, and having formed on or fixed to their united ends two perforated knuckles, a, the said doors being set at such an angle one to the other as will carry the door 5 against one of the walls of the oven, or nearly so, when the door 4 is closed against the oven-frame 2. Between the said two doors 4 and 5 is fixed an open-work metal frame, 6, of any suitable construction, and said two doors and interposed metal frame are hung on the frame 2 by passing the rod or pintle 3 through the knuckles 0 and a, respectively, on the oven-frame and on the doors, the latter being thereby adapted to swing within each of the shelf-openings in said frame between the cross-bars n to bring a shelf out of the oven and to swing it back therein.

In using the above-described oven, whenit is desired to place cores therein to be baked, one of the said shelves 6, with its attached doors 4 and 5, is swung to the position shown' in Fig. 1, thereby bringing the open-work shelf on which the cores and their supporting-pans are laid outside of the oven, [and bringing the door .5 against the inner side of the frame 2, and effectually shutting that shelf:-

opening, so that no cold air can enter the oven while the shelf is receiving said cores, and

' door 4 is swungagainst the outer side of the after the latter have been placed thereon the frame 2, thereby carrying the shelf 6 and its contents, together with the door 5, attached to said shelf, into the oven and closing the shelflopening in frame 2. A suitable handle, 0, is attached to each door 4, whereby thelat ter is conveniently manipulated.

It will be seen from the above description :that each shelf 6 is capable of being withdrawn from the oven independently of the other, and has attached to one edge thereof a door, 5, to close the even when it is drawn out, and to its opposite edge a door, 4, to close the oven when the shelf is carried into the latter.

It is obvious that the use of the above-described oven may not be limited to baking cores only.

What I claim as my invention is- 1. An oven for baking cores, having 'one'or therein, combined with one or more shelves,

substantially as described, each havinga door attached to its opposite edges, said doors and shelf being hinged by one end to said frame, whereby the shelf has a vibratory movement in one of said openings and either of said doors is caused to close the latter, substantially as set forth. I p

ELI MILLETT.

Witnesses:

G. M. CHAMBERLAIN, WM. H. CHAPIN. 

